CARACAS - Former Venezuelan state Governor Pablo Perez said on Saturday he had been barred from holding public office for 10 years, the third ban on an opposition politician in the last week. The comptroller's office this week also disqualified former legislator Maria Corina Machado and ex-mayor Vicencio Scarano, both candidates in Dec. 6 parliamentary elections, from holding office. In their case the ban was effective for 12 months. Critics says President Nicolas Maduro is seeking to clamp down on opposition leaders and discourage voters ahead of an election polls forecast his party is likely...